Advertising device



H. K. MAcDOUGALL. ADVERTISING DEVICE. APPLICATION man JUL-Y2. I921.

1,405,304. PatentedJan. 31, 1922.

W/rA/E ES' 01/ hf/rnmcfloam L A TTORIVEYS UNITED STATES guerrxnunnrn MAODOIJ'GALL or AYER, MASSACHUSETT$.I"

.e viiarlsme Davies- To all whom it may concern."

Be i known that I, HUGH MacDon- GALL, a citizen of the United States, and a disposed longitudinally of the car beneath the roof in the customary position of such advertisements and having means to intermittently turn, the said advertising mount about its own axis through the mediumof a fan adapted to be turned by wind pressure due to the motion of the car.

The nature of the invention and its dis-- tinctive features and advantages will more clearly appear as the description proceeds.

Figure 3 is an end view of the advertising device, a portion of the car and the fan casingvbeing in transverse vertical section.

igure 4 is a longitudinal vertical section of the fan casing, the fan being shown therein in elevation.

In carrying out my invention in accordance with the illustrated example, a fan 10 is provided turning about a vertical axis above the clear story of the car A, the fan shaft 11 extending downwardly to the interior of the car. The fan casing 12 is open at both ends and disposed longitudinally of the car, and at one side of the air passage through the casing, the side wall is concaved as at 13, so that the blades during one-half of the revolution turn within the protection of said concaved portion, leaving one or more blades projecting into the air passage to receive the air pressure due to the movement of the car. At the opposite side of the passageway, the side wall is disposed ob- Specificationof Letters Patent. Patentedll an-f3l 1922- a m ubafi1edau1 2,192.1.serialu fasaiesf I I liquely from each end towards therent'er,

and at the central portion is a shallow con Gave 15 in said side wall adjacent; to the pathof moveme t of the blades-i On the shaft 11, within the car A, is a bevel pinion 16 meshing with a similar pinion 17 on shaft 18 having a driving connection with the advertising mount. In the illustrated form, on the shaft 18 is a drive pulley 19 over which a belt 20runs to a driven pulley 21 on a shaft 22, turning in bearing in hanger 23 or other suitable support. On the shaft 24 is an elongated advertisement mount 25 disposed, longitudinally of the car beneath the roof adapted to receive a multiplicity of advertisements. The mount 25 may be of any suitable cross section, the same being polygonal in the illus trated example. Said shaft 24 turns in bearings on brackets 26lor other suitable supports. The driving connection between the shaft 22 and the shaft 24 in the form shown comprises a Geneva wheel 27 on the shaft 24,

-in theIradial slots of which is adapted to engage a lateral pin 28 on' a disk 29 fixed on the shaft 22. By the described arrangement, it will be obvious that with the fan 10 turning under the wind pressure, the fan I shaft 11 will turn shaft 18 and through the belt 20 turn the shaft 22, the turning of which will cause the engagement of the drive disk 29 with the Geneva wheel 27 sothat the advertisements on the advertisement mount 25 will be intermittently displayed.

I would state in conclusion that while the illustrated example constitutes a practical embodiment of my invention, I do not limit myself strictly to the mechanical details herein illustrated, since manifestly the same can be considerably varied without departing from the spirit of the invention as defined in the appended claims.

Having thus described my invention, I claim:

PATENT OFFICE-Q! 1. A display device for car, advertising,

comprising a turnable mount adapted to receive the advertisements and having means to support the same in the interior of a car, a fan and a fan casing having means to support the same above the car to cause the'fan to be actuated by the wind pressure produced by the motion of the car and means to cause intermittent turning of the said zftdvertisement mount with the turning of the an. c

2. A. display device for car advertising,

comprising afan and fan casing having means to support the same above the ear roof with the fan shaft extending doWn-.

drive belt running over said pulley, an

elongated revoluble mount adapted to receive advertisements and means to intermittently turn said mount with the turning of said third shaft.

3. A display device for car'iadvertising,

comprising a fan and fan casing having means to support the same above the car roof, a .revoluble mount adapted to receive advertisements and means to drive said mountwith the turning of the fan shaft, said fan easing having a through passage for air under pressure, one side Wall "of said passage having a concave recess in Which the fan blades turn'during half their revolution, the opposite side Wall havinga central concavity and inclines leading tosaid concavity from both ends of the casing.

HUGH KENNETH MACDOUGALL. 

